Paint industry:
Titanium Dioxide is an inorganic white pigment mainly composed of titanium dioxide, which can be divided into three types according to crystal morphology: perovskite, anatase, and rutile. Due to its high refractive index, strong color fading ability, high whiteness, non toxicity, and good stability, titanium dioxide is widely used in industries such as coatings, plastics, papermaking, and inks, with the largest usage in the coatings industry accounting for about 60%.
Whether solvent based or water-based coatings, if titanium dioxide is used, its function is not only to cover and decorate, but more importantly, to improve the physical and chemical properties of the coating, enhance chemical stability, increase coverage, color fading, corrosion resistance, light resistance, weather resistance, enhance the mechanical strength and adhesion of the paint film, prevent cracks, prevent the penetration of ultraviolet rays and moisture, thereby delaying aging and prolonging the life of the paint film. At the same time, it can also save materials and increase variety.
01
The Influence of Particle Size of Titanium Dioxide on Coating Covering Power
The different shapes and sizes of titanium dioxide particles result in varying degrees of light scattering, which is a key factor affecting the coverage of titanium dioxide. Research has shown that under the same conditions, when the particle size of titanium dioxide is between 160-350nm, which is about 0.4-0.5 times the wavelength of visible light, it has strong scattering ability for light and will directly affect the coating's coverage in application.
In the coating system, if the film-forming material is not sufficient to completely coat the titanium dioxide particles, it will cause the titanium dioxide particles to come into contact and aggregate with each other, which is equivalent to an increase in the particle size of titanium dioxide and a decrease in the coating's covering power.
02
The Influence of Dispersion of Titanium Dioxide on Coating Covering Power
In the field of coatings, the degree of dispersion of powder particles largely determines product performance. During the production of coatings, the dispersion of titanium dioxide requires wetting, sanding, and dispersion processes.
The stable suspension state of titanium dioxide in coatings can improve the coating's covering power. However, due to the certain activity of titanium dioxide, the system environment used will have a certain impact on its dispersion, which can easily lead to poor dispersion states such as flocculation, precipitation, and suspension. Therefore, the degree of dispersion also affects the coating's covering power.
03
The influence of dispersant dosage on coating coverage
When titanium dioxide is dispersed, its particles tend to agglomerate due to their relatively small size compared to the filler. Therefore, the selection and dosage of dispersants will affect the dispersibility of titanium dioxide and also affect the covering power of the paint film. Experiments have shown that the dispersion degree of pigments and fillers increases with the increase of dispersant dosage. The improvement of dispersibility reduces the distribution range of pigment and filler particle size, resulting in a decrease in particle size and an increase in the covering power of the paint film.
04
Sustainable Development Path of Titanium Dioxide for Coatings
Titanium dioxide, as an efficient light scattering pigment, provides excellent whiteness and coverage for coatings. With the rapid rise of the automotive industry, construction industry, and water-based coating market, the overall demand for titanium dioxide is also increasing rapidly.
The resulting constraints on resources, energy consumption, and environment are becoming increasingly prominent. It is urgent to improve the sustainable development capability of the titanium dioxide industry.
In addition to promoting the development of new processes and technologies for titanium dioxide production, coating manufacturers also need to actively explore how to improve the efficiency of titanium dioxide use or seek new alternatives to reduce the amount of titanium dioxide used.
We supply Titanium Dioxide R996 , Titanium Dioxide R699 , Titanium Dioxide R698 ,Titanium Dioxide R6618 ,Titanium Dioxide R218 , Titanium Dioxide R216 , Titanium Dioxide ART312 ,Titanium Dioxide R5566 , tio2 R298 , Tio2 R895 , TIO2 R886 , TIO2 TYR588 ....
